Rotary engine.



No. 68(1,635. Patented Aug. I3, I90l. J. T. BTES.

ROTARY ENGINE.

(Application filed Mar. 6, 1901.)

3 Sheets-Sheet I.

No. 680,635. Patented Aug. I3, |90I.

J. T. BUUTES.

ROTARY ENGINE.

(Application led Mar. 6, 1901.)

(No Model.)

3 Sheets-Sh-eet 2.y

NUIIIHNHIHININ 'l lll ATTu Y Patented Aug. I3, I90I. J. T'. BUOTES Y ROTARY ENGINE.

(Application Mar einen.

.lOl-IN T. BOOTES, OF VILMINGTON, DELAVARE.

ROTARY ENGINE.

SPECIFICATIGN forming part of Letters Patent No. 680,635, dated August 13, 1901.

Application iiledlllaroh 6, 1901lv Serial No. 50,010. (llo model.)

To all whom, it may concern:

Beit known that I, JOHN T. BOOTES, a citi- Zen of the United States, and a resident of Wilmington, in the county of Newcastle and State of Delaware, have made a certain new and useful Invention in Rotary Engines and I declare the following to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure l is a cross-section of my compound reversible engine, partly broken away. Fig. 2 is a vertical longitudinal section. Fig. 3 illustrates the reversed position of valves. Fig. 4; is a cross-section of my stationary oompound engine. Fig. 5 is an end view of one of the cylinder-heads with packing-rings removed therefrom. Figs. 6 and 7 are detail views of the valves of the high-pressure cylinder of the reversible engine. Fig. 8 is a front View of packing-ring ct. Figs. 9 and 10 illustrate the packing-ring a2. Fig. l1 is a front elevation of the governor for the stationary engine.

This invention has relation to steam-engines, and has for its object the provision of ing or stationary type of engine, in which the letter A designates the steam-cylinder, having the piston B, provided with a springpressed iin B', arranged radially thereto in a `slot thereof and having a bearing against the peripheral wall of the cylinder.

This fin is provided with a T or L form head b, having a convex surface of the same curvature as the peripheral wall of the cylinder and of somewhat extended bracing character, such head ment for the steam is provided by a springpressed packing-bar C acting against the peripheral surface of the piston and having cam approaches C2 upon each side thereof to force the fin into its seat, said bar being provided with a spring-pressed end packing cX.

Equidistant from and adjacent to said packing-bar are the steam inlet and exhaust passages c c', respectively, connecting the cylinder with the valve-chamber or steam-chest D of cylindrical character. cylindrical valve E, having suitable packingrings, works closely in this chamber and is provided with a port e through its peripheral Wall, arranged to be brought alternately into and out of register with the inlet-passage c. The steam-induction passage F into the valvechamber or steam-chest communicates With said valve E at one end thereof,which is open, and is spanned by a yoke f of the valve, having an operating-rod connection f extending through the head of the valve-chamber, suitably packed and having an eccentric and rod connection F for actuating the same. This valve E has a central reduced portion forming peripheral passage c', arranged to span exhaust-passage c and eduction-passage FX, connecting the valve-chamber with the atmosphere or with the low-pressure cylinder.

The heads A of the cylinder have annular grooves a therein, spring-pressed washers a being seated in said grooves and upon which turn annular split expansion-rings c2, also kseated in said grooves and forming an exten- `sion of the peripheral portion of the piston at each side thereof and turning therewith through a pin connection c3.

The tin B has end spring-pressed packingribs b2 seated therein and bearing against the outer lateral surfaces of rings a2 and against the end Walls of the cylinder. A springpressed bar b3 is seated in the piston and has a bearing against a lateral wall of the fin. These devices, in connection with packingbar G, form an efficient means for preventing escape of steam from the cylinder and for preventing escape of steam from one side of the fin B to the other in the cylinder.

A vibratory hollow IOO G designates my automatic steam cut-off, comprising a pulley G', having a pivoted weighted lever G2, arranged under centrifugal force to operate slide G3 more or less to vary the degree of eccentricity of the pivot g of the eccentric-rod g to said slide. This eccentricrod has a parallel-movement link connection g2 with the shaft of the valve E, which has the usual stu thug-box.

In the reversible engine the automatic cutoff for the steam above described is omitted, and a simple eccentric and rod operates the vibratory valve E', which in this case is a close iit Within valve E, which is operated only as a throttle and when it is desired to reverse the engine. This inner vibratory valve E', which is also of hollow cylindrical form, has a port e3 in its peripheral Wall and arranged to be brought alternately into and out of register with port e in valve E, which is ordinarily in constant communication with steam-inlet passage o to admit steam to the cylinder.

When it is desired to reverse the engine,-

valve E is turned through lever-clutch H, which in this case connects with rod f until port e2 thereof, adjacent and similar to port e and which has hitherto been cut off or out of action, is brought into register With exhaustpassage c', which will noW become the steaminlet passage. At the same time port e is cut off from action, and peripheral passage e' connects the passage c With the atmosphere and passes out of register with passage c. Valve E has a second port e4, arranged to be brought alternately into and out of register With port e2 in valve E, which when the engine is reversed is in constant communication With passage c to ad mit steam to the cylinder. In using valve E as a throttle it is turned sufficiently to cut ot'f steam from both passages c and c.

'When these engines are made in the compound form, which is preferred, the stationary low-pressure cylinder Willnot be provided with a valve and the cylinder for the reversible low-pressure engine Will have but one valve to serve to reverse the steam.

Vhat I claim isl. In a rotary engine, the cylindrical piston, the spring-pressed packing-bar havinga bearing against the peripheral surface of said piston, the cam approaches to said bar, the radial spring-pressed iin working in a slot of said piston, the spring-pressed end packing for said iin, the spring-pressed lateral packing for said tin, said 1in having a bracing T- form head provided with an outer convex surface concentric with that of the piston, the heads of the cylinderhavingannular grooves therein, the spring-pressed Washers in said grooves, and the expansion-rings working in said grooves, and having a pin connection with the piston, whereby they rotate therewith, substantially as specified.

2. In a reversible engine, the-valve-chamber, the steam-passages connecting said chamber and the cylinder, a hollow cylindrical throttle and reversing-valve Working in said chamber, and having ports in its peripheral Wall arranged to be brought into and out of register with said passages, said valve having a peripheral passage arranged to connect either of said steam-passages with the lowpressure cylinder, the hollow cylindrical valve working in said reversing-valve, and having ports in the peripheral Wall arranged to be brought in register with the peripheral ports of said reversing valve, substantially as specified.

3. In a compound reversible rotary engine, the high and low pressure cylinders having each a cylindrical piston, a spring-pressed packing-bar, having a bearing against the peripheral surface of said piston, cam approaches to said bar, and a radial springpressed iin Working in a slot of said piston, the valve-chamber for the high-pressure cylinder, the steam-passages connecting said chamber and the cylinder, a hollow cylind rical throttle and reversing-valve Workingin said chamber, and having ports in its peripheral vvall arranged to be brought into and out of register with said passages, said valve having a peripheral passage arranged to connect either of said steam-passages with the lov pressure cylinder, the valve-chamber of the loW- pressure cylinder, the steam-passages connecting said chamber and cylinder, and a reversing-valve in said chamber, substantially as specified.

In testimony whereof I aiiix my signature in presence of two Witnesses.

JOHN T. BOOTES.

Witnesses:

WILBUR L. SAssn, JOSEPH GoFF.

IOO 

